Process method for converting metal magnesium slag into desulphurizer of boiler

Abstract

The invention discloses a method for converting metal magnesium smelting and reducing slag into a desulphurizer for a coal-fired boiler. The system mainly comprises a drum-type air-water cooled crusher, an airtight water cooled buried scraper conveyor, an airtight vibrating screen classifier, an airtight bucket elevator, a magnesium slag powder storehouse, a bag-type dust collector, a draught fanand the like, and a pipeline connecting system. The waste slag by smelting the metal magnesium is treated to become the desulphurizer used by a circulating fluidized bed boiler, and the recovery and reuse of the waste are realized. The process method has the advantages of economy, energy conservation and emission reduction: a metal magnesium smelting unit converts the wastes into commodities, andthe air pollution and soil pollution are removed and the residual-heat utilization is realized. In addition, the cheap desulphurizer can be provided for fluidized bed boilers in electric power plants. The method belongs to the field of treatment for solid wastes and is applied to the waste residue treatment and utilization of the metal magnesium smelting unit by the thermal reduction method.

Description

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AI Technical Summary

Benefits of technology

The present invention describes a process for cooling and pulverizing high-temperature magnesium slag balls. The process involves using a cooling pulverizer and a buried scraper machine to gradually reduce the temperature of the slag balls. During this process, the slag balls are powdered and some retain their spherical shape. The patent also mentions the use of a cooling silo and a suction hood to reduce dust pollution during unloading. However, it points out that the dust collection system is not effective in removing dust from the high-temperature airflow, resulting in dust circulation. The invention also highlights the use of motor vehicles to transport the high-temperature slag balls, maintaining their temperature for better waste heat recovery. The cooling mechanism and equipment structure are not explained in detail in the patent, but it mentions that the cooler used in the invention is similar to a drum. The invention utilizes a double-effect heat transfer mechanism, combining water-cooled surface heat exchange and air-cooled contact heat exchange for improved cooling efficiency. The technical effects of the invention include economic and environmental benefits. The use of magnesium slag desulfurizer, which is a waste material, reduces the cost of desulfurization compared to using finished limestone or lime powder. The invention also promotes the circular economy by utilizing waste to treat waste, addressing the long-standing issues of magnesium slag treatment and air and soil pollution in the metal magnesium industry.

Problems solved by technology

This patented technical solution described in the patents describes how to efficiently treat wasted materials like magnetic metal sludge without generating harmful substances when they enter the environment. By combining these two types of material, one type does work better while another works well overall.

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